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US6099451: Method and apparatus for manufacturing a bag with a reclosable zipper

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Filing Information

Inventor(s) Steven C. Mulder · James K. Holmes ·
Assignee(s) Robert Bosch Corporation ·
Attorney/Agent(s) Michael Best & Friedrich LLP ·
Primary Examiner John Sipos ·
Assistant Examiner Steven Jensen ·
Application Number US9241564
Filing date 02/01/1999
Issue date 08/08/2000
Predicted expiration date 02/01/2019
U.S. Classifications 493/214  · 493/213  ·
International Classifications B31B 190  ·
Kind CodeA
International Classifications 493213;214;927;940 ·
Related U.S. Application DataThis application claims the benefit of U.S. Provisional Application No. 60/073,343, filed Feb. 2, 1998.
21 Claims, No Drawings


Abstract

An apparatus and method for manufacturing a bag with a reclosable zipper includes feeding an elongated sheet of bag film in a first direction under a placement head. A zipper assembly is fed in a second direction substantially perpendicular to the first direction into the placement head, and the segment of the zipper assembly in the placement head is cut off. Rollers may be used to retain the zipper segment in the placement head. The placement head, with the zipper segment, is moved adjacent the bag film. The bag film is then compressed between a hot sealing bar and a resilient portion of the placement head to seal the zipper segment to the bag film. Then the bag film is folded over the zipper segment, sealed along a bottom and rear seam, and sealed to the other side of the zipper segment.

Independent Claims | See all claims (21)

  1. 1. A method of manufacturing a bag with a reclosable zipper, the method comprising the steps of:(a) providing an elongated web of bag film having a longitudinal axis and a width in a direction perpendicular to the axis;(b) providing a zipper segment including male and female strips of zipper engaged so that the zipper segment is in a closed condition, the zipper segment having a length approximately one-half the width of the web, one of the male and female strips including a flange;(c) providing a zipper placement head having a support strip;(d) inserting the zipper segment into the placement head, and supporting the zipper segment flange with said support strip so that the zipper segment extends generally perpendicular to the axis and so that the zipper segment extends only partially across the web;(e) moving the placement head and zipper segment generally perpendicular to and toward the web;(f) sealing one of the male and female strips of the zipper segment to the web;(g) removing the zipper segment from the placement head; and(h) folding the web over the other of the male and female strips of the zipper segment and sealing the web thereto so as to form a bag with the zipper in the mouth of the bag.
  2. 10. An apparatus for manufacturing a bag with a reclosable zipper from a continuous web of bag film and from a continuous length of zipper assembly having male and female strips of zipper engaged so that the zipper is in a closed condition, the zipper assembly also having a flange, the apparatus comprising a placement head adapted to support a segment of the zipper assembly, the placement head including a support strip adapted to support the zipper segment flange, and the placement head including at least one roller adapted to hold the flange against the support strip, the roller being oriented such that rotation of the roller in response to insertion of the zipper segment into the placement head maintains the flange against the support strip.
  3. 16. An apparatus for manufacturing a bag with a reclosable zipper, the apparatus utilizing an elongated web of bag film having a longitudinal axis and a width in a direction perpendicular to the axis, the apparatus comprising:placing means for placing on the web a zipper segment, the zipper segment including male and female strips of zipper engaged so that the zipper segment is in a closed condition, and including a flange, the zipper segment being placed on the web so that the zipper segment extends perpendicular to the axis, and the zipper segment having a length approximately one-half the width of the web so that the zipper segment extends only partially across the web, the placing means including means for moving a length of zipper over the web in a direction perpendicular to the axis, and means for cutting the length of zipper to provide the zipper segment, the placing means further including a zipper placement head having a support strip that extends beneath the zipper segment flange, and a plurality of floating rollers that hold the flange against the support strip, the placing means further including means for moving the length of zipper into the zipper placement head prior to cutting the length of zipper, so that the zipper segment is located in the zipper placement head, and means for moving the zipper placement head toward and generally perpendicular to the web so as to place the zipper segment on the web;sealing means for sealing one of the male and female strips of the zipper segment to the web; andfolding and sealing means for folding the web over the other of the male and female strips of the zipper segment and sealing the web thereto so as to form a bag with the zipper in the mouth of the bag.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US4617683 Minigrip, Inc. Christoff Oct 1986
US4709398 Minigrip, Inc. Ausnit Nov 1987
US4878987 Minigrip, Inc. Ven Erden Nov 1989
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Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
EP0410126INCORPORATED MINIGRIPJan 1991

Patent Family

The current document is not in a family.